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Explaining the Differences Between Function Module and Subroutine in SAP ABAP
When discussing SAP ABAP programming, it is important to understand the distinctions between a function module and a subroutine. Here are the main differences:
Function Module:
- Can be called from within and outside of the SAP system.
- Can be created as a standalone object and reused across multiple programs or function modules.
- Provides better encapsulation and modularity as it can have its own interface and parameters.
- Can be remotely called in a distributed environment.
Subroutine:
- Can only be called within the program it is defined in.
- Exists within the same program and does not have a separate identity like a function module.
- Does not have its own interface and parameters, and shares the data directly within the program.
- Cannot be called remotely and does not support reusability across programs.
Understanding these differences is crucial for SAP ABAP programmers to design efficient and maintainable programs.
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